Martin Hallbeck, Linköping University (IMAGE) Linköping University Caption This is Martin Hallbeck, associate professor, Linköping University. Credit Emma Busk Winquist/Linköping University Usage Restrictions Please use with proper credit and caption. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.